1. Department of Experimental Pain Research, Medical Faculty Mannheim; University of Heidelberg; Mannheim Germany
2. Department of Anesthesiology; Stanford University; Stanford CA
3. Department of Physiology I; Friedrich-Alexander-University Erlangen-Nuremberg; Nuremberg Germany
4. Centre for Pain Medicine, Swiss Paraplegic Centre; Nottwil Switzerland
5. London Pain Consortium, Neurorestoration Group, King's College London; London United Kingdom
6. Department of Anaesthesiology; Kantonsspital Lucerne; Lucerne Switzerland
7. Department Clinical Neurophysiology; Uppsala University; Uppsala Sweden